Be sure to check out this blog if testing the Cloud at Amazon. Please see David Peake's excellent article in Oracle Magazine on how to get there. It really works. Some things have changed to the better since the article was written.
Now APEX is pre-installed. And you get going at once. Impressive.
Mail in EC2, careful since there are things with mail, spammers wants to use the gate ways... So consult this article at OracleQuicks.
Demo App for REST enabled SQL
6 months ago